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<Title>Polar Line Chart</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Polar Line Chart</p>
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<div class="content">
<img src="images/polarline.png" width='460' height='500'>
<br><br>
This example demonstrates a polar line chart, completed with data symbols and data labels.<br><br>
<ul><li> The grid lines in this example is circular (instead of polygonal as is in <a href="simpleradar.htm">Simple Radar Chart</a>). This is configured using <a href="PolarChart.setGridStyle.htm">PolarChart.setGridStyle</a>.<br><br>
<li> The angular scale in this example is set to 0 - 360, with spokes every 30 units. This is by using <a href="AngularAxis.setLinearScale.htm">AngularAxis.setLinearScale</a>.<br><br>
<li> The two lines in this example is added using <a href="PolarChart.addLineLayer.htm">PolarChart.addLineLayer</a> with angular coordinates of the points provided by <a href="PolarLayer.setAngles.htm">PolarLayer.setAngles</a>.<br><br>
<li> The data symbols are enabled using <a href="PolarLayer.setDataSymbol.htm">PolarLayer.setDataSymbol</a>.<br><br>
<li> The data labels are configured using <a href="PolarLayer.setDataLabelFormat.htm">PolarLayer.setDataLabelFormat</a> to consist of the radial and angular coordinates.<br><br>
<li> The data label background colors and 3D borders are configured using <a href="PolarLayer.setDataLabelStyle.htm">PolarLayer.setDataLabelStyle</a> and <a href="Box.setBackground.htm">Box.setBackground</a>.<br><br>
<li> Note that the blue line in this example is a closed loop (the default), while the red is not a loop. This is configured by using <a href="PolarLineLayer.setCloseLoop.htm">PolarLineLayer.setCloseLoop</a>.</ul>
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/polarline.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%
// The data for the chart
double[] data0 = {90, 25, 40, 55, 68, 44, 79, 85, 50};
double[] angles0 = {15, 60, 110, 180, 230, 260, 260, 310, 340};

double[] data1 = {80, 91, 66, 80, 92, 87};
double[] angles1 = {40, 65, 88, 110, 150, 200};

// Create a PolarChart object of size 460 x 500 pixels, with a grey (e0e0e0) background and 1 pixel
// 3D border
PolarChart c = new PolarChart(460, 500, 0xe0e0e0, 0x000000, 1);

// Add a title to the chart at the top left corner using 15pt Arial Bold Italic font. Use a wood
// pattern as the title background.
c.addTitle("Polar Line Chart Demo", "Arial Bold Italic", 15).setBackground(c.patternColor("wood.png"
    ));

// Set center of plot area at (230, 280) with radius 180 pixels, and white (ffffff) background.
c.setPlotArea(230, 280, 180, 0xffffff);

// Set the grid style to circular grid, with grids below the chart layers
c.setGridStyle(false, false);

// Add a legend box at top-center of plot area (230, 35) using horizontal layout. Use 10pt Arial
// Bold font, with 1 pixel 3D border effect.
LegendBox b = c.addLegend(230, 35, false, "Arial Bold", 9);
b.setAlignment(Chart.TopCenter);
b.setBackground(Chart.Transparent, Chart.Transparent, 1);

// Set angular axis as 0 - 360, with a spoke every 30 units
c.angularAxis().setLinearScale(0, 360, 30);

// Add a blue (0xff) line layer to the chart using (data0, angle0)
PolarLineLayer layer0 = c.addLineLayer(data0, 0x0000ff, "Close Loop Line");
layer0.setAngles(angles0);

// Set the line width to 2 pixels
layer0.setLineWidth(2);

// Use 11 pixel triangle symbols for the data points
layer0.setDataSymbol(Chart.TriangleSymbol, 11);

// Enable data label and set its format
layer0.setDataLabelFormat("({value},{angle})");

// Set the data label text box with light blue (0x9999ff) backgruond color and 1 pixel 3D border
// effect
layer0.setDataLabelStyle().setBackground(0x9999ff, Chart.Transparent, 1);

// Add a red (0xff0000) line layer to the chart using (data1, angle1)
PolarLineLayer layer1 = c.addLineLayer(data1, 0xff0000, "Open Loop Line");
layer1.setAngles(angles1);

// Set the line width to 2 pixels
layer1.setLineWidth(2);

// Use 11 pixel diamond symbols for the data points
layer1.setDataSymbol(Chart.DiamondSymbol, 11);

// Set the line to open loop
layer1.setCloseLoop(false);

// Enable data label and set its format
layer1.setDataLabelFormat("({value},{angle})");

// Set the data label text box with light red (0xff9999) backgruond color and 1 pixel 3D border
// effect
layer1.setDataLabelStyle().setBackground(0xff9999, Chart.Transparent, 1);

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "", "title='[{dataSetName}] ({radius}, {angle})'"));
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Polar Line Chart&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Polar Line Chart
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here is the chart image ****** --&gt;
    &lt;%= viewer.renderHTML(response) %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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